syzkaller login: [ 31.598683] BUG: Bad rss-counter state mm:000000004247a9b4 type:MM_FILEPAGES val:33 [ 31.599972] BUG: Bad rss-counter state mm:000000004247a9b4 type:MM_ANONPAGES val:22 [ 31.752521] ================================================================== [ 31.753648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.754798] Read of size 8 at addr ffff888016c8cb38 by task sshd/221 [ 31.755927] [ 31.756195] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.757264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.758484] Call Trace: [ 31.758876] <TASK> [ 31.759225] dump_stack_lvl+0x91/0xf0 [ 31.759827] print_report+0xcc/0x620 [ 31.760418] ? __virt_addr_valid+0x102/0x340 [ 31.761125] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.761767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.762395] kasan_report+0xbe/0xf0 [ 31.762887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.763527] vma_interval_tree_remove+0xc75/0xec0 [ 31.764145] vma_prepare+0xc54/0x11a0 [ 31.764645] __split_vma+0x5af/0x950 [ 31.765144] ? __pfx___split_vma+0x10/0x10 [ 31.765700] ? find_held_lock+0x2c/0x110 [ 31.766235] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.766817] ? lock_is_held_type+0x9f/0x120 [ 31.767373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.768002] ? mtree_range_walk+0x632/0x900 [ 31.768574] ? mas_walk+0x5c7/0x7c0 [ 31.769078] do_vmi_munmap+0x1f1/0x2b0 [ 31.769592] mmap_region+0x1f9/0x2660 [ 31.770095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.770628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.771369] ? __pfx_lock_acquire+0x10/0x10 [ 31.771928] ? __pfx_mmap_region+0x10/0x10 [ 31.772486] ? security_mmap_addr+0x7d/0xa0 [ 31.773066] ? get_unmapped_area+0x1f5/0x3f0 [ 31.773636] do_mmap+0x854/0xf00 [ 31.774096] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.774614] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.775202] ksys_mmap_pgoff+0x3af/0x500 [ 31.775730] do_syscall_64+0x3f/0x90 [ 31.776238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.776927] RIP: 0033:0x7f30cef87d82 [ 31.777401] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.779632] RSP: 002b:00007fff1ff12428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.780572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30cef87d82 [ 31.781474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30ce3c1000 [ 31.782366] RBP: 00007f30ce3c1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.783244] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c01f52ef70 [ 31.784123] R13: 00007fff1ff12440 R14: 00007fff1ff12470 R15: 00007fff1ff127d0 [ 31.785036] </TASK> [ 31.785338] [ 31.785563] Allocated by task 214: [ 31.786018] kasan_save_stack+0x22/0x50 [ 31.786544] kasan_set_track+0x25/0x30 [ 31.787059] __kasan_slab_alloc+0x59/0x70 [ 31.787605] kmem_cache_alloc+0x16b/0x370 [ 31.788138] vm_area_dup+0x20/0x160 [ 31.788609] __split_vma+0x170/0x950 [ 31.789110] split_vma+0xc6/0x110 [ 31.789572] mprotect_fixup+0x8d2/0xb30 [ 31.790094] do_mprotect_pkey+0x87e/0xd40 [ 31.790653] __x64_sys_mprotect+0x78/0xc0 [ 31.791194] do_syscall_64+0x3f/0x90 [ 31.791690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792351] [ 31.792574] Freed by task 19: [ 31.792997] kasan_save_stack+0x22/0x50 [ 31.793524] kasan_set_track+0x25/0x30 [ 31.794044] kasan_save_free_info+0x2b/0x50 [ 31.794590] __kasan_slab_free+0x10a/0x190 [ 31.795142] kmem_cache_free+0x10d/0x4d0 [ 31.795672] rcu_core+0x8c8/0x2860 [ 31.796233] __do_softirq+0x1b7/0x7d4 [ 31.796750] [ 31.796974] Last potentially related work creation: [ 31.797588] kasan_save_stack+0x22/0x50 [ 31.798115] __kasan_record_aux_stack+0x8e/0xa0 [ 31.798713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.799386] remove_vma+0x139/0x170 [ 31.799857] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.800433] do_vmi_munmap+0x1f1/0x2b0 [ 31.800945] __vm_munmap+0x138/0x3a0 [ 31.801412] __x64_sys_munmap+0x59/0x80 [ 31.801912] do_syscall_64+0x3f/0x90 [ 31.802391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803033] [ 31.803248] The buggy address belongs to the object at ffff888016c8cae0 [ 31.803248] which belongs to the cache vm_area_struct of size 168 [ 31.804738] The buggy address is located 88 bytes inside of [ 31.804738] freed 168-byte region [ffff888016c8cae0, ffff888016c8cb88) [ 31.806177] [ 31.806398] The buggy address belongs to the physical page: [ 31.807067] page:00000000ef825e14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c8c [ 31.808162] memcg:ffff88800fd1c301 [ 31.808595] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.809252] page_type: 0xffffffff() [ 31.809708] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.810641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd1c301 [ 31.811550] page dumped because: kasan: bad access detected [ 31.812215] [ 31.812431] Memory state around the buggy address: [ 31.813045] ffff888016c8ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.813912] ffff888016c8ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.814788] >ffff888016c8cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.815640] ^ [ 31.816255] ffff888016c8cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.817131] ffff888016c8cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.817987] ================================================================== [ 31.818941] Disabling lock debugging due to kernel taint [ 33.854645] BUG: Bad rss-counter state mm:00000000fe5350e8 type:MM_FILEPAGES val:33 [ 33.855855] BUG: Bad rss-counter state mm:00000000fe5350e8 type:MM_ANONPAGES val:22 [ 34.246717] BUG: Bad rss-counter state mm:000000006af0605d type:MM_FILEPAGES val:33 [ 34.247929] BUG: Bad rss-counter state mm:000000006af0605d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16395' (ECDSA) to the list of known hosts. 2023/06/19 16:39:55 fuzzer started 2023/06/19 16:39:55 dialing manager at localhost:44161 2023/06/19 16:39:55 checking machine... 2023/06/19 16:39:55 checking revisions... [ 34.999959] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:39:55 testing simple program... [ 35.050958] cgroup: Unknown subsys name 'net' [ 35.098196] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016a43500 RCX=0000000000000000 RDX=ffff888016a43500 RSI=0000000000000002 RDI=ffff88800edf9b80 RBP=ffff88800edf9b80 RSP=ffff88801587fce0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=ffff888016a43500 R14=0000000000000000 R15=ffff888008f92000 RIP=ffffffff814c07eb RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcbbc9af900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd24ebb000 CR3=000000000fcc2000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2034353a39333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff97742dd90 CR3=0000000008db2000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=13d0db5ea88684897242afb794512c57 XMM02=2c67c8bc2e329bc3000000000011d098 XMM03=fb795ef6d65770560000000000124610 XMM04=a204704a3953655600000000000ae988 XMM05=e4cb8bb95a7664b60000000000134108 XMM06=994ee21cda59cd1e0000000000132f70 XMM07=e042d86d42eb936e0000000000124890 XMM08=8c9a4abf7e6293a2000000000011d0f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000